| 摘要 |
Apparatus for and a method of operating a mass flowmeter having a first embodiment that uses gyroscopic forces to determine material flow information for a material flow. The interior of the flow tube defines a helix element that imparts a rotation to the material flow within the flow tube. Driver induced transverse flow tube vibrations and the rotation imparted to the material flow together generate cyclic gyroscopic forces within the flow tube. The magnitude of the flow tube deflection from the gyroscopic forces is related to the magnitude of the material flow and is measured to determine material flow information. A second embodiment of the flowmeter detect the Coriolis forces on the vibrating flow tube and generates material flow information from the detected Coriolis forces. The Coriolis based flow information and the gyroscopic based flow information are both applied to meter electronics which uses the two sets of Information for comparison and error checking and other purposes. |
